Golborne Vintage Radio

On a fairly tricky mechanical build at the moment so treated myself to an optical centre punch and I'm most impressed.  Should have had one years ago rather than ending up with over sized holes.

Soba Optical Centrepunch 180970 From Chronos | eBay

Put 3 groups of 4 holes, over a 6 inch span, thru a 2mm Ali plate drilled out in two stages, pilot and 4.5mm.  The 4mm screws located perfectly in the tapped holes of linear bearings and leadscrew.

Gary

The late Brian Cuff also used one.

If it was good enough for Brian then ...

I was lucky to visit him maybe a year before he died and was most impressed with his workshops and the things he had made. Very clever engineer.

Gary